Batch stainless steel pipe automatic laser cutting mechanism and processing method thereof

Abstract

The present application belongs to the technical field of stainless steel pipe cutting, in particular to a batch stainless steel pipe automatic laser cutting mechanism and its processing method, which comprises a rack, the upper surface of the rack is fixedly provided with a mounting back plate, the upper surface of the mounting back plate is provided with a conveying plate, and the upper surface of the conveying plate is provided with a grid; through the cooperation of the driving gear, the ratchet and the pawl, the precise control of the cutting angle is realized, the consistency of the special angle cutting such as the bevel groove is ensured, the angle deviation of the pipe fittings caused by vibration or cutting force reaction in the laser cutting process is prevented, the high-energy beam in the laser cutting process can generate instantaneous impact force on the pipe fittings, the close engagement of the pawl and the ratchet can offset the impact force, the angle of the pipe fittings is stably kept at the target value, the stepwise precise control of the angle is realized, the pitch of the ratchet of the ratchet is controlled to correspond to an angle increment per tooth, and the pulse control of the servo motor is matched, so that the angle adjustment precision is improved, and the high-precision bevel cutting requirement is met.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of stainless steel pipe cutting, in particular to a batch stainless steel pipe automatic laser cutting mechanism and a processing method thereof. BACKGROUND

[0002] With the development of society, stainless steel pipes are widely used in many fields such as stair guardrails, security doors, water pipes and flues due to their excellent corrosion resistance and water resistance. Stainless steel pipes are usually of standard specifications when they come out of the factory, and need to be cut and processed in actual applications to meet the needs of different scenes.

[0003] A patent with the publication number CN116352168A discloses an automatic cutting mechanism for steel pipes of different lengths, which includes a base, a sliding table electric cylinder, a guide rail, a feeding mechanism, a stabilizing mechanism, a cutting mechanism and a receiving mechanism. The feeding mechanism and the receiving mechanism are respectively arranged on both sides of the cutting mechanism. The feeding mechanism is used to convey the steel pipe along the guide rail to the cutting mechanism and control the cutting length, and the receiving mechanism is used to clamp the cutting end of the steel pipe. The cutting mechanism is used to cut the steel pipe into a specified length. The stabilizing mechanism is arranged between the feeding mechanism and the cutting mechanism to ensure the stability of the steel pipe conveying together with the feeding mechanism. The present application can realize automatic steel pipe cutting, use the sliding table electric cylinder to control the length of the steel pipe, complete the steel pipe cutting, and the cutting length precision can reach 0.1mm. In addition, it can also meet the requirements of long pipe feeding and automatic cutting of steel pipes of various lengths, and significantly improve the cutting efficiency under the premise of ensuring the length precision.

[0004] However, the above-mentioned technology has the following defects: although the mechanism can realize automatic cutting of single steel pipe, the feeding, conveying and cutting processes are designed around single pipe, and it is difficult to simultaneously process multiple stainless steel pipes. In addition, the pipe diameter and wall thickness parameters have large differences, and the structure design of the stabilizing mechanism and the receiving mechanism components in the above-mentioned technology is relatively fixed, which is difficult to adjust flexibly to adapt to different specifications of pipe fittings. When cutting stainless steel pipes of different diameters, complex debugging or replacement of components is often required, which not only increases the operation difficulty and time cost, but also may affect the cutting precision due to improper adjustment, thereby reducing the versatility and practicality of the equipment.

[0005] Therefore, the present application provides a batch stainless steel pipe automatic laser cutting mechanism and a processing method thereof. SUMMARY

[0006] In order to make up for the deficiencies of the prior art and solve at least one technical problem proposed in the background art.

[0007] The technical scheme adopted by the present application to solve its technical problems is: the automatic laser cutting mechanism for batch stainless steel pipes and the processing method thereof, comprising a rack, a mounting back plate fixedly installed on the upper surface of the rack, a conveying plate provided on the upper surface of the mounting back plate, a grid provided on the upper surface of the conveying plate, a longitudinal rail plate fixedly installed on the upper surface of the rack at one side edge, a pneumatic push rod provided on the side surface edge of the longitudinal rail plate, a transmission wheel fixedly installed on the lower surface of the pneumatic push rod, the transmission wheel and the conveying plate on one side being in the same plane, a notch provided on the side of the rack close to the conveying plate, a bed body base fixedly installed on the side surface of the rack, a horizontal plate fixedly installed on the upper surface of the bed body base at one side edge, and a change mechanism connected to the horizontal plate on the bed body base;

[0008] The change mechanism comprises a fixed seat connected to the side end face of the horizontal plate, an annular groove provided in the middle of the upper surface of the fixed seat, a positioning angle groove provided on the side of the fixed seat close to the annular groove, an outer peripheral groove provided on the side of the fixed seat close to the annular groove, a ratchet wheel movably connected to the inner bottom wall of the annular groove through a rotating shaft, a pawl movably clamped on the outer arc surface ratchet teeth of the ratchet wheel, the pawl being movably connected to the outer peripheral groove on the lower surface of one side through a rotating shaft, a return tension spring connected to the upper surface of one side of the pawl, a drive gear movably connected to the inner bottom wall of the positioning angle groove through a rotating shaft, and a V-shaped plate fixedly installed on the upper surface of the drive gear.

[0009] The upper surface of the V-shaped plate is provided with a raised edge on both sides, a pipe clamping mechanism is fixedly installed on the upper surface of the raised edge through bolts, the pipe clamping mechanism comprises a ring-shaped base plate fixedly installed on the surface of the raised edge, and an inclined edge boss is provided on the back of the ring-shaped base plate.

[0010] The inner side wall of the inclined edge boss is movably connected to an abutting wheel through a rotating shaft, the front surface of the ring-shaped base plate is provided with a threaded hole, the ring-shaped base plate is fixedly installed with a ring-shaped reinforcing rib through the threaded hole on one side, the ring-shaped reinforcing rib is of an elastic structure, a through hole is formed in the middle of the side surface of the ring-shaped reinforcing rib, and an expansion ring is sleeved on the inner arc surface of the through hole of the ring-shaped reinforcing rib.

[0011] The side surface of the expansion ring is provided with a hinged part on the back, the expansion ring is fixedly connected to the ring-shaped reinforcing rib through the hinged part, the outer arc surface of the expansion ring away from the hinged part is provided with a deformation cavity groove, and a circular supporting ring is fixedly installed on the side of the ring-shaped reinforcing rib away from the hinged part.

[0012] The outer arc surface of the circular supporting ring is connected to a connecting lock rod, the inner arc surface of the connecting lock rod on one side is sleeved with a half-along clamping arm A, the inner arc surface of the connecting lock rod on the other side is sleeved with a half-along clamping arm B, and the side surfaces of the half-along clamping arm A and the half-along clamping arm B are both provided with arc surfaces.

[0013] The arc surface is in the same plane with the through hole on one side of the annular reinforcing rib, and the top and bottom of the side surface of the half along the clamping arm B and the half along the clamping arm A are provided with connecting holes.

[0014] The inner arc surface of the connecting hole is connected with a clamping tension spring, the number of the clamping tension spring is two, and the clamping tension spring is arranged on the top and the bottom of the arc surface, the outer arc surface of the half along the clamping arm B and the half along the clamping arm A is provided with a semicircular part, and the outer arc surface of the semicircular part is in abutment with the bottom surface of the connecting lock rod.

[0015] The two side end faces of the lathe bed base are provided with sliding guide rails, the inner side walls of the sliding guide rails are slidably connected with driving side plates, the side surface of the two driving side plates is fixedly connected with a transverse driving source in the middle, and the upper surface of the transverse driving source is connected with a longitudinal driving source.

[0016] The end face of the longitudinal driving source is fixedly connected with a cantilever beam, one side of the cantilever beam is fixedly connected with a laser cutting head, the top of the laser cutting head is provided with a sensor, and the laser cutting head and the pipe clamping mechanism are in the same plane.

[0017] A kind of batch stainless steel pipe automatic laser cutting mechanism and processing method thereof, the method uses the above-mentioned batch stainless steel pipe automatic laser cutting mechanism, including the following steps:

[0018] S1, loading preparation: the stainless steel pipe to be cut is placed neatly on the conveying plate, according to the length and diameter of the pipe fitting, the deformation degree of the expansion ring and the pre-tightening force of the clamping tension spring are adjusted to make the pipe clamping mechanism adapt to the pipe fitting specification;

[0019] S2, automatic conveying: start pneumatic push rod, conveying wheel pushes pipe fitting along conveying plate to notch, pipe fitting enters the clamping range of pipe clamping mechanism through notch, and abutment wheel positions pipe fitting end;

[0020] S3, clamping and fixing: after pipe fitting enters clamping area, half along clamping arm A and half along clamping arm B are automatically clamped under the action of clamping tension spring, and the synchronous fixing of multiple pipe fittings is completed.

[0021] S4, parameter setting and adjustment: set cutting length and laser power parameters through control system, drive gear drives V-shaped plate to adjust pipe fitting angle, and angle position is locked by ratchet and pawl.

[0022] S5, laser cutting: transverse driving source and longitudinal driving source drive laser cutting head to move to cutting starting position, after sensor calibrates pipe fitting position, laser cutting head is started, and multiple pipe fittings are simultaneously cut along preset path.

[0023] S6, blanking and circulation: after cutting, the pipe clamping mechanism is loosened, and the cut pipe falls to the collection area. At the same time, the conveying wheel continues to convey the next batch of pipes, and the above steps are repeated to realize continuous batch processing.

[0024] The beneficial effects of the present application are as follows:

[0025] 1. By the cooperation of the driving gear, the ratchet and the pawl, the cutting angle is accurately controlled, ensuring the consistency of special angle cutting such as bevel and groove. Not only can it prevent the pipe from angle deviation due to vibration or cutting force reaction during laser cutting, but also can it ensure the pipe angle to be stable at the target value by the close engagement of the pawl and the ratchet to offset the instantaneous impact force of the high-energy beam during laser cutting. In addition, it also realizes the stepwise precise control of the angle, the pitch of the ratchet teeth is controlled to correspond to an angle increment per tooth, and the pulse control of the servo motor can improve the angle adjustment accuracy to meet the demand of high-precision bevel cutting.

[0026] 2. By the cooperative design of elastic adaptation and mechanical clamping of the pipe clamping mechanism, multiple stainless steel pipes with different diameters can be stably clamped at the same time. The elastic deformation and expansion of the annular reinforcing rib and the cavity deformation of the expansion ring can adapt to the difference in pipe diameter, ensuring that pipes of different specifications can be tightly fitted with the clamping parts. The semi-flange clamping arm A and the semi-flange clamping arm B form a ring clamping under the action of the clamping spring, and the support structure of the semi-circular part and the connecting lock rod can provide uniform and sufficient clamping force for the pipe, so that the pipe can be prevented from displacement or shaking even under high-frequency vibration during laser cutting, ensuring the stability of synchronous processing of multiple pipes.

[0027] 3. By adopting the design of synchronous clamping and cutting of multiple pipes, the limitation of traditional single processing is broken. The pipe clamping mechanism can stably clamp multiple stainless steel pipes of different specifications at the same time. The laser cutting head can cut all clamped pipes synchronously under the cooperative action of the transverse driving source and the longitudinal driving source, and the processing amount per unit time is significantly improved compared with the single cutting mode. At the same time, the automatic conveying and discharging process reduces the manual intervention link, so that the single processing cycle time is greatly shortened compared with traditional equipment, which can meet the high-efficiency demand of large-scale production. BRIEF DESCRIPTION OF DRAWINGS

[0028] The present application will be further described below in conjunction with the drawings.

[0029] Figure 1 is the overall perspective view of the stainless steel pipe automatic laser cutting of the present application;

[0030] Figure 2 is the front view of the present application;

[0031] Figure 3 is the overall front view of the present application;

[0032] Figure 4 is the top view structural schematic diagram of the changing mechanism in the application;

[0033] Figure 5 is the bottom view structural schematic diagram of the pipe clamping mechanism in the application;

[0034] Figure 6 is the exploded structural schematic diagram of the pipe clamping mechanism in the application;

[0035] Figure 7 is the structural schematic diagram of the expansion ring in the application;

[0036] Figure 8 is the structural schematic diagram of the circular supporting ring in the application;

[0037] Figure 9 is the structural schematic diagram of the half-rim clamping arm B and the half-rim clamping arm A in the application.

[0038] In the figure: 1, frame; 101, conveying plate; 102, grid; 103, notch;

[0039] 2, longitudinal rail plate; 3, pneumatic push rod; 4, conveying wheel; 5, bed base;

[0040] 6, changing mechanism; 61, fixed seat; 611, annular groove; 612, positioning angle groove; 62, ratchet wheel; 63, pawl; 64, reset tension spring; 65, driving gear;

[0041] 7, V-shaped plate; 701, flange;

[0042] 8, pipe clamping mechanism; 81, annular base plate; 811, beveled boss; 82, abutting wheel; 83, annular reinforcing rib; 84, expansion ring; 841, hinged part; 85, circular supporting ring; 851, connecting lock rod; 86, half-rim clamping arm A; 87, half-rim clamping arm B; 88, arc surface; 89, connecting hole; 810, clamping tension spring; 812, semicircular part;

[0043] 9, sliding guide rail; 10, driving side plate; 11, transverse driving source; 12, longitudinal driving source; 13, cantilever beam; 14, laser cutting head. DETAILED DESCRIPTION

[0044] In order to make the technical means, creative features, purposes and effects realized by the application easy to understand, the application is further described below in combination with specific embodiments.

[0045] As Figure 1 and Figure 3As shown, the embodiment of the present application comprises a rack 1, the upper surface of the rack 1 is fixedly provided with a mounting back plate, the upper surface of the mounting back plate is provided with a conveying plate 101, the upper surface of the conveying plate 101 is provided with a grid 102, the upper surface of the rack 1 is fixedly provided with a longitudinal rail plate 2 at one side edge, the longitudinal rail plate 2 is provided with a pneumatic push rod 3 at one side surface edge, the lower surface of the pneumatic push rod 3 is fixedly provided with a conveying wheel 4, the conveying wheel 4 is in the same plane as the conveying plate 101 at one side, the side of the rack 1 close to the conveying plate 101 is provided with a notch 103, the side surface of the rack 1 is fixedly provided with a bed base 5, the upper surface of the bed base 5 is fixedly provided with a horizontal plate at one side edge, and the horizontal plate on the bed base 5 is connected with a change mechanism 6.

[0046] The upper surface of the rack 1 is fixedly provided with a mounting back plate, the conveying plate 101 on the upper surface of the back plate is used for bearing the stainless steel pipe, the grid 102 on the surface of the conveying plate 101 can reduce the contact area of the pipe fitting and the plate surface, and reduce the frictional resistance, the longitudinal rail plate 2 at one side edge of the rack 1 is provided with the pneumatic push rod 3, the conveying wheel 4 on the lower surface of the push rod is in the same plane as the conveying plate 101, the conveying wheel 4 is driven to rotate through the extension and contraction of the pneumatic push rod 3, the pipe fitting is conveyed to the cutting area, the side of the rack 1 close to the conveying plate 101 is provided with the notch 103, and the notch 103 is used for guiding the pipe fitting to the subsequent cutting station.

[0047] The bed base 5 on the side surface of the rack 1 provides support for the cutting core component, and the change mechanism 6 connected with the horizontal plate on the top of the bed base 5 is used for realizing the synchronous adjustment of multiple pipe fittings, in the change mechanism 6, the fixed seat 61 is fixed on the bed base 5 through the horizontal plate, the ring-shaped groove 611 on the surface of the fixed seat 61 is movably connected with the ratchet wheel 62 through a rotating shaft, the ratchet teeth on the outer arc surface of the ratchet wheel 62 are movably connected with the ratchet pawl 63, the bottom of the ratchet pawl 63 is connected to the peripheral groove of the fixed seat 61 through a rotating shaft, the reset tension spring 64 on the upper surface ensures that the ratchet pawl 63 is always engaged with the ratchet wheel 62, thereby realizing the one-way rotation limiting of the ratchet wheel 62, the driving gear 65 is installed in the positioning angle groove 612 of the fixed seat 61 through a rotating shaft, and the V-shaped plate 7 fixed on the upper surface of the driving gear 65 can be adjusted in angle along with the rotation of the driving gear 65.

[0048] The operator places the stainless steel pipe to be processed on the conveying plate 101 stably, the strip-shaped hollow structure of the grid 102 can effectively reduce the contact area of the pipe fitting and the plate surface, so that the frictional force borne by the pipe fitting in the conveying process is greatly reduced, at this time, the pneumatic push rod 3 on the longitudinal rail plate 2 receives a starting signal, the push rod piston rod extends downward, drives the conveying wheel 4 to be in contact with the surface of the stainless steel pipe, then the conveying wheel 4 starts to rotate under the driving of the driving motor, the rotating direction is consistent with the conveying direction of the pipe fitting, and the pipe fitting is stably pushed along the extension direction of the grid 102 by means of the frictional force between the wheel surface and the pipe fitting.

[0049] When the pipe is pushed to the gap 103 of the rack 1, the guide plates on both sides of the gap 103 can accurately correct the running direction of the pipe, and ensure that the pipe can accurately enter the clamping area of the pipe clamping mechanism 8. In the process of gradually approaching the pipe clamping mechanism 8 at the end of the pipe, the abutting wheel 82 inside the back inclined edge boss 811 of the annular base plate 81 will first contact the end of the pipe. The abutting wheel 82 is flexibly rotated through the rotating shaft, and generates rolling friction when contacting the pipe, which avoids damaging the end of the pipe by knocking, and preliminarily limits the axial displacement of the pipe by the blocking action of the wheel body, and prepares for subsequent clamping and fixing.

[0050] As shown in Figure 2 and Figure 4 , the changing mechanism 6 includes a fixed seat 61 connected to the side end face of the horizontal plate. The upper surface of the fixed seat 61 is provided with an annular groove 611 in the middle. The side of the fixed seat 61 close to the annular groove 611 is provided with a positioning angle groove 612. The side of the fixed seat 61 close to the annular groove 611 is provided with a peripheral groove. The inner bottom wall of the annular groove 611 is movably connected with a ratchet wheel 62 through a rotating shaft. The outer arc surface ratchet teeth of the ratchet wheel 62 are movably connected with a pawl 63. The lower surface of the pawl 63 is movably connected to the peripheral groove through a rotating shaft. The upper surface of the pawl 63 is connected with a return tension spring 64. The inner bottom wall of the positioning angle groove 612 is movably connected with a drive gear 65 through a rotating shaft. The upper surface of the drive gear 65 is fixedly installed with a V-shaped plate 7.

[0051] When it is necessary to cut the inclined transverse section (such as the bevel, inclined surface non-right angle section) of the pipeline, the drive system of the changing mechanism 6 drives the drive gear 65 to generate rotary power under the drive of the servo motor. Since the drive gear 65 and the V-shaped plate 7 are rigidly connected by bolts, the rotation of the gear is directly converted into the rotary motion of the V-shaped plate 7. The V-shaped plate 7 rotates around the rotating shaft in the positioning angle groove 612, and the pipe clamping mechanism 8 fixed on the two sides of the V-shaped plate 7 rotates at the same time, thereby driving the clamped stainless steel pipe to change the angle synchronously. At this time, the axis of the pipe and the cutting plane of the laser cutting head 14 form a preset angle, which lays the foundation for cutting different angle transverse sections.

[0052] In the angle adjustment process, the cooperation of the fixed seat 61 with the ratchet wheel 62 and the pawl 63 realizes dynamic limiting and precise locking of the angle. The ratchet wheel 62 is linked with the driving gear 65 through a rotating shaft and rotates synchronously with the rotation of the V-shaped plate 7. The ratchet teeth on the outer arc surface of the ratchet wheel 62 are always in meshing state with the pawl 63. When the driving gear 65 drives the pipe to rotate to the target angle, the ratchet teeth of the ratchet wheel 62 will lift the pawl 63, so that the pawl 63 swings upward around the rotating shaft in the peripheral groove, and at the same time, the reset tension spring 64 stores elastic potential energy. When the angle of the pipe reaches the preset value to cut the transverse section, the driving gear 65 drives the pipe to rotate, the driving motor stops running, and the reset tension spring 64 releases the elastic potential energy to pull the pawl 63 to quickly fall back, and then the pawl 63 is re-clamped into the gap between the ratchet teeth of the ratchet wheel 62 to form a rigid lock.

[0053] The one-way locking structure of the ratchet wheel 62 and the pawl 63 has two key functions. One is to prevent the pipe from being deviated in angle due to vibration or cutting force reaction during laser cutting. The high-energy beam during laser cutting will produce an instantaneous impact force on the pipe, and the close engagement of the pawl 63 and the ratchet teeth can offset the impact force to ensure that the angle of the pipe is stable at the target value. The other is to realize the step-by-step precise control of the angle. The pitch of the ratchet teeth of the ratchet wheel 62 is controlled to correspond to an angle increment per tooth, and the pulse control of the servo motor can improve the angle adjustment accuracy to meet the high-precision bevel cutting requirement.

[0054] In addition, the annular groove 611 of the fixed seat 61 provides a stable rotating track for the ratchet wheel 62 to avoid radial deviation during rotation. The positioning angle groove 612 limits the rotating center of the driving gear 65 to ensure the consistency of the rotating track of the V-shaped plate 7, thereby ensuring the synchronization of the angle adjustment of multiple pipes. Even if multiple steel pipes of different specifications are clamped, the angle of all the pipes can be uniformly adjusted through the mechanism to ensure the consistency of the transverse section angle after cutting.

[0055] As Figure 5 , Figure 6 , Figure 7 , Figure 8 and Figure 9As shown, the upper surface of the V-shaped plate 7 is provided with a raised edge 701 on both sides, and the upper surface of the raised edge 701 is fixedly provided with a pipe clamping mechanism 8 by bolts. The pipe clamping mechanism 8 comprises a ring-shaped base plate 81 fixedly installed on the surface of the raised edge 701. The back top of the ring-shaped base plate 81 is provided with a beveled boss 811. The inner side wall of the beveled boss 811 is movably connected with an abutting wheel 82 through a rotating shaft. The front surface of the ring-shaped base plate 81 is provided with a threaded hole. The ring-shaped base plate 81 is fixedly provided with a ring-shaped reinforcing rib 83 through the threaded hole on one side. The ring-shaped reinforcing rib 83 is of elastic structure. The middle part of one side surface of the ring-shaped reinforcing rib 83 is provided with a through hole. An expansion ring 84 is sleeved on the inner arc surface of the through hole of the ring-shaped reinforcing rib 83. The side surface of the expansion ring 84 is provided with a hinged part 841 at the back. The expansion ring 84 is fixedly connected with the ring-shaped reinforcing rib 83 through the hinged part 841. The outer arc surface of the expansion ring 84 away from the hinged part 841 is provided with a deformation cavity groove. The side of the ring-shaped reinforcing rib 83 away from the hinged part 841 is fixedly provided with a circular supporting ring 85.

[0056] The outer arc surface of the circular supporting ring 85 is connected with a connecting lock rod 851. The inner arc surface of the connecting lock rod 851 is sleeved with a half-along clamping arm A 86 on one side. The inner arc surface of the connecting lock rod 851 is sleeved with a half-along clamping arm B 87 on the other side. The half-along clamping arm A 86 and the half-along clamping arm B 87 are provided with an arc surface 88 on one side. The arc surface 88 is in the same plane with the through hole on one side of the ring-shaped reinforcing rib 83. The half-along clamping arm B 87 and the half-along clamping arm A 86 are provided with a connecting hole 89 on the top and the bottom of one side surface. The inner arc surface of the connecting hole 89 is penetrated and connected with a clamping tension spring 810. The number of the clamping tension spring 810 is two, which are placed on the top and the bottom of the arc surface 88. The outer arc surfaces of the half-along clamping arm B 87 and the half-along clamping arm A 86 are provided with a semicircular part 812. The outer arc surface of the semicircular part 812 is in abutting fit with the bottom surface of the connecting lock rod 851.

[0057] When the stainless steel pipe enters the clamping area, the ring-shaped reinforcing rib 83 is automatically deformed in the radial direction according to the outer diameter of the pipe due to the elastic adaptation. Since the ring-shaped reinforcing rib 83 is made of elastic material, it can preliminarily adapt to common stainless steel pipe specifications.

[0058] The expansion ring 84 nested in the through hole of the ring-shaped reinforcing rib 83 further improves the adaptation accuracy. The outer arc surface of the expansion ring 84 away from the hinged part 841 is provided with a deformation cavity groove. The cavity groove can compensate for the size difference caused by different pipe diameters through local wrinkle deformation. When the pipe passes through the expansion ring 84, the cavity groove will automatically adjust according to the outer diameter of the pipe. The larger the pipe diameter, the higher the degree of cavity groove expansion, and the larger the overall outer diameter of the expansion ring 84. The smaller the pipe diameter, the more obvious the cavity groove contraction, and the smaller the outer diameter of the expansion ring 84. Finally, the inner arc surface of the expansion ring 84 is tightly fitted with the outer surface of the pipe to form a preliminary positioning.

[0059] At the same time, the abutting wheel 82 on the back of the annular substrate 81 restricts the displacement of the pipe from the end, and the abutting wheel 82 is flexibly rotated through the rotating shaft inside the bevel boss 811. When the pipe end contacts it, the wheel body rotates synchronously with the pipe advancing, which not only avoids damage to the pipe caused by rigid collision, but also assists the axial positioning of the pipe through the friction force of the wheel surface, ensuring that the ends of multiple pipes are on the same reference surface.

[0060] On the basis of elastic adaptation, the half along the clamping arm A86 and the half along the clamping arm B87 are rigidly clamped by the clamping tension spring 810. The two clamping arms are respectively sleeved on the inner arc surfaces of the connecting lock rod 851, and the connecting holes 89 at the top and bottom thereof are connected by the clamping tension spring 810 to form a symmetrical tension structure. When the pipe is in place, the contraction force of the tension spring drives the two clamping arms to rotate inward with the connecting lock rod 851 as the fulcrum, so that the arc surface 88 on the inner side of the clamping arm gradually wraps the outer surface of the pipe.

[0061] The arc surface 88 is designed to be profiled, with an arc that matches the curvature of the outer circle of the stainless steel pipe, which can maximize the contact area to disperse the clamping force. For pipes with thin walls, the arc surface 88 can avoid local crushing by increasing the contact area. For pipes with thick walls, the arc surface 88 can transmit greater clamping force by closely fitting. At the same time, the semicircular part 812 of the outer arc surface of the clamping arm and the bottom surface of the connecting lock rod 851 always remain in abutment. This support structure can prevent the clamping arm from tilting laterally during clamping, ensuring that the clamping force is evenly distributed along the radial direction.

[0062] During laser cutting, the pipe will be subjected to high-frequency vibration and thermal stress impact. The pipe clamping mechanism 8 counteracts these disturbances through multiple structural designs. The elastic restoring force of the annular reinforcing rib 83 continuously acts on the surface of the pipe, forming dynamic pressure compensation. When the pipe is slightly displaced due to vibration, the reinforcing rib quickly adjusts the direction of deformation and pushes the pipe back to its original position through the reaction force.

[0063] As shown in Figure 1 The two side end faces of the bed base 5 are each provided with a sliding guide rail 9, and the inner side wall of the sliding guide rail 9 is slidingly connected with a driving side plate 10. The side surface of the two driving side plates 10 is fixedly connected with a horizontal driving source 11 at the middle part, the upper surface of the horizontal driving source 11 is connected with a vertical driving source 12, the end face of the vertical driving source 12 is fixedly connected with a cantilever beam 13, one side of the cantilever beam 13 is fixedly connected with a laser cutting head 14, the top of the laser cutting head 14 is provided with a sensor, and the laser cutting head 14 and the pipe clamping mechanism 8 are in the same plane.

[0064] After the clamping and angle adjustment of the pipe, the transverse driving source 11 and the longitudinal driving source 12 start to work together. The transverse driving source 11 is usually a high-precision servo motor matched with a ball screw structure, which can drive the driving side plate 10 to move horizontally along the sliding guide rail 9 on both sides of the bed base 5, thereby driving the longitudinal driving source 12, the cantilever beam 13 and the laser cutting head 14 to adjust the horizontal position. The longitudinal driving source 12 also adopts a servo driving mode, which can drive the cantilever beam 13 to move in a direction perpendicular to the horizontal direction, thereby adjusting the longitudinal position of the laser cutting head 14.

[0065] The sensor at the top of the laser cutting head 14 can scan and detect the position of the pipe in real time, and convert the detected position information into an electrical signal to feed back to the control system. According to the preset cutting path and the real-time position data fed back by the sensor, the control system continuously adjusts the operating parameters of the transverse driving source 11 and the longitudinal driving source 12, so as to ensure that the laser cutting head 14 can accurately aim at the pipe to be cut.

[0066] When the laser cutting head 14 reaches the cutting starting position and completes the positioning and calibration, the laser generator inside the laser cutting head 14 emits a high-energy-density laser beam. After focusing through the optical system, the laser beam forms a very small spot at the cutting position of the pipe, which instantly heats the local area of the stainless steel pipe to a melting or even vaporization temperature. At the same time, the auxiliary gas sprayed by the cutting head blows away the melted or vaporized metal scraps, forming a smooth cutting section. During the entire cutting process, the laser cutting head 14 moves along the preset trajectory to cut multiple stainless steel pipes at the same time, efficiently completing the machining task of a specified length.

[0067] The machining method is described in detail as follows.

[0068] Firstly, the operator selects the stainless steel pipes to be cut, ensuring that the surface of the pipe is free of obvious deformation, scratches and other defects. Then, the operator arranges the selected stainless steel pipes in order on the conveying plate 101, and keeps a certain distance between adjacent pipes to avoid collision during conveying.

[0069] According to the length and diameter specifications of the pipe, the operator needs to adjust the pipe clamping mechanism 8 adaptively. For pipes with large differences in diameter, the operator adjusts the initial deformation degree of the deformation cavity groove area of the expansion ring 84 by gently prying it with a special tool, so that it can better adapt to the outer diameter of the pipe. For pipes with thin walls or soft materials, the operator adjusts the hook position of the clamping tension spring 810 to reduce the pre-tightening force of the tension spring, so as to prevent the pipe from being deformed due to excessive clamping force. For pipes with thick walls, the operator increases the pre-tightening force of the clamping tension spring 810 to ensure stable clamping. After the adjustment is completed, the operator checks whether each part of the pipe clamping mechanism 8 is connected firmly to ensure that it can normally play a clamping role.

[0070] The pneumatic push rod 3 on the longitudinal rail plate 2 responds, and the air pump inside it starts to work, and the compressed air is introduced into the cylinder, pushing the piston rod to move downward, so that the conveying wheel 4 is in close contact with the surface of the stainless steel pipe on the conveying plate 101. At this time, the driving motor of the conveying wheel 4 starts to work, and the motor output shaft drives the conveying wheel 4 to rotate through the speed reducer. In the rotating process, the conveying wheel 4 pushes the pipe along the grid 102 stably by means of the friction between the pipe and the conveying wheel 4. When the pipe passes through the gap 103, the guide plates on both sides of the gap 103 will slightly extrude and correct the pipe to ensure that the axis of the pipe is consistent with the clamping center of the pipe clamping mechanism 8. With the continuous conveying of the pipe, the end of the pipe finally contacts the abutting wheel 82. The rotation of the abutting wheel 82 will slow down the advancing speed of the pipe until the pipe stops moving axially, completing the automatic conveying process.

[0071] When the end of the pipe contacts the abutting wheel 82 and stops moving, the clamping system of the pipe clamping mechanism 8 automatically starts to work. The annular reinforcing rib 83 further fits the outer surface of the pipe under the action of its own elastic force. The deformation cavity groove of the expansion ring 84 completes the final adaptive deformation according to the actual pipe diameter of the pipe. At the same time, the clamping tension spring 810 generates a contraction force, pulling the half-along clamping arm A 86 and the half-along clamping arm B 87 to rotate inward, and the arc surface 88 gradually clamps the outer surface of the pipe.

[0072] During the clamping process, if it is found that the clamping of a certain pipe is too loose, the position of the connecting lock rod 851 can be adjusted manually to increase the pressure of the half-along clamping arm on the pipe. If it is found that the clamping is too tight, causing the pipe to deform, the clamping tension spring 810 can be appropriately loosened. After all the pipes are firmly clamped, the locking device of the clamping mechanism will automatically start to work, fixing the positions of the half-along clamping arm A 86 and the half-along clamping arm B 87 to prevent loosening during the cutting process.

[0073] The cutting length is accurately set according to actual needs. The driving gear 65 starts to rotate under the drive of the servo motor, and the pipe clamping mechanism 8 and the pipe are rotated through the V-shaped plate 7. The current angle value will be displayed in real time on the display screen of the control system. When it rotates to the preset angle, the driving gear 65 automatically stops rotating. At this time, the ratchet wheel 62 and the pawl 63 are tightly engaged under the action of the return tension spring 64, firmly locking the angle of the pipe. The operator can perform secondary confirmation through the angle calibrator.

[0074] After receiving the cutting signal, the transverse driving source 11 and the longitudinal driving source 12 start to drive the laser cutting head 14 to move according to the preset program. The transverse driving source 11 drives the laser cutting head 14 to move horizontally along the sliding guide rail 9, adjusts the position of the cutting head in the horizontal direction, and the longitudinal driving source 12 drives the laser cutting head 14 to move vertically along the cantilever beam 13, adjusts the position of the cutting head perpendicular to the transverse direction.

[0075] When the laser cutting head 14 moves to the cutting starting position, the sensor at the top thereof emits a detection light beam to scan the actual position of the pipe, and the sensor transmits the scanned position data to the control system, which analyzes and processes the data and then finely adjusts the position of the laser cutting head 14 to ensure that the laser focal point of the cutting head accurately falls on the pipe to be cut, and after calibration, the laser cutting head 14 emits a laser beam to simultaneously cut a plurality of pipes according to the preset cutting path, and in the cutting process, the auxiliary gas is continuously sprayed to timely blow away the molten slag generated during cutting, thereby ensuring the smoothness and neatness of the cutting section.

[0076] After cutting is completed, the laser cutting head 14 is driven by the driving source to retreat to the initial position, the clamping tension spring 810 of the pipe clamping mechanism 8 is automatically released, and the half-rimmed clamping arms A86 and B87 are opened outward to release the clamping of the pipe. At this time, the cut pipe falls from the pipe clamping mechanism 8 under the action of its own gravity, slides through the guide chute below the bed base 5 into the material frame in the collection area.

[0077] At the same time, the pneumatic push rod 3 is started again, and the conveying wheel 4 continues to push the next batch of stainless steel pipes on the conveying plate 101 to the pipe clamping mechanism 8, and the above-mentioned clamping, angle adjustment, cutting and other processes are repeated to realize continuous batch processing. The operator only needs to replace the material frame in the collection area from time to time and supplement the stainless steel pipes to be processed to the conveying plate 101.

[0078] The above, front, rear, left, right, up and down are based on the drawings in the specification Figure 1 and are defined as front, left, right, up and down according to the standard of the human observation angle, and the side of the device facing the observer is defined as front, the left side of the observer is defined as left, and so on.

[0079] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as limiting the scope of protection of the present application.

[0080] The basic principles, main features and advantages of the present application are shown and described above. It should be understood by those skilled in the art that the present application is not limited by the above-mentioned embodiments, and the above-mentioned embodiments and descriptions in the specification are only to illustrate the principles of the present application, and various changes and improvements can be made to the present application without departing from the spirit and scope of the present application, and these changes and improvements all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A mechanism for automatic laser cutting of batch stainless steel tubes, characterized by: The utility model provides a kind of pipe clamping mechanism, including rack (1), the upper surface of the rack (1) is fixedly installed with installation back plate, the upper surface of the installation back plate is equipped with conveying plate (101), the upper surface of the conveying plate (101) is equipped with grid (102), the upper surface of the rack (1) one side edge is fixedly installed with longitudinal rail plate (2), the side surface edge of the longitudinal rail plate (2) is equipped with pneumatic push rod (3), the lower surface middle part of the pneumatic push rod (3) is fixedly installed with transmission wheel (4), the transmission wheel (4) and the conveying plate (101) of one side are in the same plane, the side of the rack (1) close to conveying plate (101) is equipped with notch (103), the side surface of the rack (1) is fixedly installed with bed body base (5), the upper surface one side edge of the bed body base (5) is fixedly installed with horizontal plate, the horizontal plate on the bed body base (5) is connected with change mechanism (6); The change mechanism (6) includes a fixed seat (61) connected to the side end surface of the horizontal plate, an annular groove (611) is formed in the middle of the upper surface of the fixed seat (61), a positioning angle groove (612) is formed on the side of the fixed seat (61) close to the annular groove (611), an outer peripheral groove is formed on the side of the fixed seat (61) close to the annular groove (611), an inner bottom wall of the annular groove (611) is movably connected with a ratchet wheel (62) through a rotating shaft, an outer arc surface ratchet of the ratchet wheel (62) is movably connected with a pawl (63), the pawl (63) is movably connected to the outer peripheral groove through a rotating shaft on one side of the lower surface, a reset tension spring (64) is connected to one side of the upper surface of the pawl (63), a driving gear (65) is movably connected to the inner bottom wall of the positioning angle groove (612) through a rotating shaft, and a V-shaped plate (7) is fixedly installed on the upper surface of the driving gear (65).

2. The automatic laser cutting mechanism for batch stainless steel pipes according to claim 1, characterized in that: The upper surface of the V-shaped plate (7) is provided with a curled edge (701) on both sides, a pipe clamping mechanism (8) is fixedly installed on the upper surface of the curled edge (701) through bolts, the pipe clamping mechanism (8) includes a ring-shaped base plate (81) fixedly installed on the surface of the curled edge (701), and an inclined edge boss (811) is formed on the top of the back surface of the ring-shaped base plate (81).

3. The automatic laser cutting mechanism for batch stainless steel pipes according to claim 2, characterized in that: An abutting wheel (82) is movably connected to the inner side wall of the inclined edge boss (811) through a rotating shaft, a threaded hole is formed on the front surface of the ring-shaped base plate (81), the ring-shaped base plate (81) is fixedly installed with a ring-shaped reinforcing rib (83) through the threaded hole on one side, the ring-shaped reinforcing rib (83) is of elastic structure, a through hole is formed in the middle of one side surface of the ring-shaped reinforcing rib (83), and an expansion ring (84) is sleeved on the inner arc surface of the through hole of the ring-shaped reinforcing rib (83).

4. The automatic laser cutting mechanism for batch stainless steel pipes according to claim 3, characterized in that: One side surface back of the expansion ring (84) is provided with a hinged part (841), the expansion ring (84) is fixedly connected with the ring-shaped reinforcing rib (83) through the hinged part (841), an outer arc surface of the expansion ring (84) away from the hinged part (841) is provided with a deformation cavity groove, and a circular supporting ring (85) is fixedly installed on one side of the ring-shaped reinforcing rib (83) away from the hinged part (841).

5. The automatic laser cutting mechanism for batch stainless steel pipes according to claim 4, characterized in that: The outer arc surface of the circular supporting ring (85) is connected with a connecting lock rod (851), the inner arc surface of the connecting lock rod (851) is sleeved with a half along clamping arm A (86) on one side, and the inner arc surface of the connecting lock rod (851) is sleeved with a half along clamping arm B (87) on the other side, and the half along clamping arm A (86) and the half along clamping arm B (87) are provided with an arc surface (88) on one side.

6. The automatic laser cutting mechanism for batch stainless steel pipes according to claim 5, characterized in that: The arc surface (88) and the through hole on one side of the annular reinforcing rib (83) are in the same plane, and the half along clamping arm B (87) and the half along clamping arm A (86) are provided with a connecting hole (89) on the top and the bottom of the surface on one side.

7. The automatic laser cutting mechanism for batch stainless steel pipes according to claim 6, characterized in that: The inner arc surface of the connecting hole (89) is penetrated and connected with a clamping tension spring (810), the number of the clamping tension spring (810) is two, and the clamping tension spring (810) is arranged on the top and the bottom of the arc surface (88), the outer arc surface of the half along clamping arm B (87) and the half along clamping arm A (86) is provided with a semicircular part (812), and the outer arc surface of the semicircular part (812) is in abutment with the bottom surface of the connecting lock rod (851).

8. The automatic laser cutting mechanism for batch stainless steel pipes according to claim 2, characterized in that: The two side end surfaces of the bed body base (5) are provided with sliding guide rails (9), the inner side walls of the sliding guide rails (9) are slidably connected with driving side plates (10), the side surfaces of the two driving side plates (10) are fixedly connected with a transverse driving source (11) in the middle, and the upper surface of the transverse driving source (11) is connected with a longitudinal driving source (12).

9. The automatic laser cutting mechanism for batch stainless steel pipes according to claim 8, characterized in that: The end surface of the longitudinal driving source (12) is fixedly connected with a cantilever beam (13), one side of the cantilever beam (13) is fixedly connected with a laser cutting head (14), the top of the laser cutting head (14) is provided with a sensor, and the laser cutting head (14) and the pipe clamping mechanism (8) are in the same plane.

10. A batch stainless steel pipe automatic laser cutting mechanism and its processing method, the method uses the batch stainless steel pipe automatic laser cutting mechanism of any one of claims 1-9, characterized in that: The steps include: S1, loading preparation: the stainless steel pipes to be cut are placed on the conveying plate (101) in an orderly manner, according to the length and diameter of the pipe, the deformation degree of the expansion ring (84) and the pre-tightening force of the clamping tension spring (810) are adjusted, so that the pipe clamping mechanism (8) is adapted to the pipe specifications; S2, automatic conveying: start the pneumatic push rod (3), the conveying wheel (4) pushes the pipe along the conveying plate to the notch (103), the pipe enters the clamping range of the pipe clamping mechanism through the notch, and the abutting wheel (82) positions the end of the pipe; S3, clamping and fixing: after the pipe enters the clamping area, the half along clamping arm A (86) and the half along clamping arm B (87) are automatically clamped under the action of the clamping tension spring (810), and the synchronous fixing of multiple pipes is completed; S4, parameter setting and adjustment: the cutting length and laser power parameters are set through the control system, the driving gear (65) drives the V-shaped plate (7) to adjust the angle of the pipe, and the angle position is locked by the ratchet wheel (62) and the ratchet pawl (63); S5, laser cutting: the transverse driving source (11) and the longitudinal driving source (12) drive the laser cutting head (14) to move to the cutting starting position, after the sensor calibrates the position of the pipe, the laser cutting head is started, and multiple pipes are cut along the preset path at the same time. S6, blanking and circulation: after cutting is completed, the pipe clamping mechanism is loosened, the cut pipe falls to the collection area, the conveying wheel continues to convey the next batch of pipes, and the steps are repeated to realize continuous batch processing.

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